Rail for a covering for an architectural opening



FIG. 1 is a top-left isometric view of a rail for a covering for an architectural opening.

FIG. 2 is a detail, top-left isometric view of the rail of FIG. 1 bounded by the detail line 2-2 as shown in FIG. 1.

FIG. 3 is a front elevation view of the rail of FIG. 1 as shown in FIG. 2.

FIG. 4 is a bottom plan view of the rail of FIG. 1 as shown in FIG. 2; and,

FIG. 5 is a left side elevation view of the rail of FIG. 1.

The broken lines, which define the bounds of the claimed design, form no part of the claimed design. 

CLAIM We claim the ornamental design for a rail for a covering for an architectural opening, as shown and described. 